Which of the following forces is responsible for keeping the planets in orbit around the Sun?

A.

magnetism

B.

gravity

C.

friction

D.

electromagnetic force

Find the net force on each box. 60 N 20 N 50 N 25 N

If the strength of the magnetic field at A is 27 units and the strength of the magnetic field at B is 3 units, what is the distance to B? 10 m 225 m 15 m

A spring that has a force constant of 1050 N/m is mounted vertically on the ground. A block of mass 1.95 kg is dropped from rest from height of 1.75 m above the free end of the spring. By what distance does the spring compress?

A pair of alkaline D batteries can provide about 98000 J of electric energy at 3.0 V. If a current of 2 A flows through two D batteries while they're in the circuit of a flashlight, how long will the batteries be able to provide power to the

A Formula One race car with mass 760.0 kg is speeding through a course in Monaco and enters counterclockwise direction about the origin of the circle. At another part of the course, the car enters a second circular turn at 170.

Red light has a shorter wavelength than yellow light.

Approximately what is the parallax angle of a star that is 20 light-years away?

If the Earth and distant stars were stationary (motionless) in space, what would we observe about the wavelength from these stars? A. Wavelengths measured would match the actual wavelengths emitted. B.

Two fire trucks with sirens speeds towards and away from an observer. Which statement is true involving the Doppler effect observed by the observer?

What warm ocean currents keep the NC coast warm, even if it is winter